/**
 * @copyright
 * Copyright (C) 2020 Assured Information Security, Inc.
 *
 * @copyright
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * @copyright
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * @copyright
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

    .code64
    .intel_syntax noprefix

    .globl  intrinsic_wrmsr
    .type   intrinsic_wrmsr, @function
intrinsic_wrmsr:

    lea rax, [rip + intrinsic_wrmsr_failed]
    mov gs:[0x250], rax

    mov ecx, edi
    mov rax, rsi
    mov rdx, rsi
    shr rdx, 32
    wrmsr

    xor rax, rax
    mov gs:[0x250], rax

    ret
    int 3

intrinsic_wrmsr_failed:

    xor rax, rax
    mov gs:[0x250], rax

    mov rax, 0x1
    ret
    int 3

    .size intrinsic_wrmsr, .-intrinsic_wrmsr
